How to avoid buying inferior filters?

What we pay attention to when buying things is nothing more than price and quality. In order to avoid buying inferior filters, let the manufacturer tell you how to avoid buying inferior filters.

1、 Choose filter manufacturers carefully, especially not blindly. It is recommended to shop around, choose those with high cost performance and meet your own requirements, and don't be greedy for cheap and ignore quality.

2、 It can be checked from the manufacturer's scale, registered capital, production cost, testing equipment, production environment, qualification certification and other data. If conditions permit, it is recommended to make a field visit to the manufacturer.

3、 Check whether the product has the product label, brand, model, size, efficiency and other parameter identification, and whether the shipment is accompanied by the product certificate.